Technical data
Safety information 
II 
Safety information 
When installing, connecting and operating the Retell 340, please follow the safety information below: 
•  Connect the connecting cables only into the correct sockets. 
•  Please ensure that cables do not lead to any danger of stumbling and avoid folding, pulling and pinching of the cables. 
•  Avoid installing near sources of electrical interference. 
•  Only connect approved accessories to the device. 
•  Never open the device. Do not touch the plug contacts with sharp or metal objects. 
•  Only use a soft, slightly moist cloth to clean your Retell 340. Do not use chemicals or abrasive cleaning products. 
•  Avoid operating your Retell 340 in damp or dusty rooms and keep it away from liquids, steam or smoke. 
•  Do not install the device where it is exposed to direct sunlight. 
•  Do not operate the device in areas with danger of explosions. 
•  Only use the supplied AC adapter. 










